​This evaluation was performed by conducting a test on three similar corrugated metal specimens. The specimens were approximately 12 inches square. The metal specimens were 25 gauge. One of the metal specimens was coated with Delcoat® one side. The other metal specimen was coated with Delcoat® on both sides. The third metal specimen was not coated and was used as the baseline sample. The heat source for the test consisted of a 250 watt light bulb placed in a 12 by 12 inch open-face box. Two identical heat sources were constructed for side by side testing of the specimens. The heat source was directed on the face of the metal specimens. The heat source apparatus was placed an equal distance from the metal specimens. Temperatures of the metal surface were taken prior to applying the heat source. The temperature of the metal was measured by using a digital reading temperature apparatus.

A test was conducted on each of the coated specimens. The first test was performed on the metal specimen with coating on one side and yielded the following results:

Test 1 - Metal Coated on One Side

Time

Metal Sample

Metal Temperature Back Side

No Direct Heat from Lamp, °F

10:00

Coated in Delcoat®

73.2

10;00

Non-coated

73.2

10:01

Coated in Delcoat®

79.9

10:01

Non-coated

80.6

10:02

Coated in Delcoat®

96.4

10:02

Non-coated

107.1

10:03

Coated in Delcoat®

112.8

10:03

Non-coated

125.5

10:04

Coated in Delcoat®

123.4

10:04

Non-coated

135.3

10:05

Coated in Delcoat®

129.2

10:05

Non-coated

140.2

10:06

Coated in Delcoat®

132.6

10:06

Non-coated

143.4

10:15

Coated in Delcoat®

140.5

10:15

Non-coated

150.8

10:30

Coated in Delcoat®

142.5

10:30

Non-coated

155.3

11:00

Coated in Delcoat®

144.9

11:00

Non-coated

155.6

Cool down, no heat source

11:01

Coated in Delcoat®

139.5

11:01

Non-coated

139.6

11:02

Coated in Delcoat®

122.4

11:02

Non-coated

117.0

11:03

Coated in Delcoat®

109.0

11:03

Non-coated

102.9

11:04

Coated in Delcoat®

99.3

11:04

Non-coated

95.4

11:05

Coated in Delcoat®

95.2

11:05

Non-coated

90.9

11:06

Coated in Delcoat®

92.1

11:06

Non-coated

87.8

11:07

Coated in Delcoat®

90.1

11:07

Non-coated

86.0

11:08

Coated in Delcoat®

88.9

11:08

Non-coated

84.7

The second test was performed on the metal specimen with coating on both sides. The results of the test are presented below:

Test 2 - Metal Coated on Both Sides

Time

Metal Sample

Metal Temperature, Back Side

No Direct Heat from Lamp, °F

8:30

Coated in Delcoat®

79.7

8:30

Non-coated

79.7

8:31

Coated in Delcoat®

87.6

8;31

Non-coated

103.6

8:32

Coated in Delcoat®

99.5

8:32

Non-coated

128.7

8:33

Coated in Delcoat®

108.2

8:33

Non-coated

140.2

8:34

Coated in Delcoat®

113.4

8:34

Non-coated

145.9

8:35

Coated in Delcoat®

117.1

8:35

Non-coated

149.2

8:36

Coated in Delcoat®

121.5

8:36

Non-coated

150.4

8:42

Coated in Delcoat®

128.1

8:42

Non-coated

152.1

8:50

Coated in Delcoat®

129.7

8:50

Non-coated

154.2

9:30

Coated in Delcoat®

135.7

9:30

Non-coated

154.3

Cool down, no heat source

9:31

Coated in Delcoat®

127.8

9:31

Non-coated

135.0

9:32

Coated in Delcoat®

120.0

9:32

Non-coated

115.8

9:33

Coated in Delcoat®

116.2

9:33

Non-coated

115.5

9:34

Coated in Delcoat®

111.0

9:34

Non-coated

108.9

9:35

Coated in Delcoat®

104.2

9:35

Non-coated

100.2

9:36

Coated in Delcoat®

97.0

9:36

Non-coated

93.4

Summary

The test results indicate that the Delcoat® coating provides a significant reduction in heat transfer through metal when applied to the metal. An 8 percent reduction of heat transfer was recorded on the back side of the metal when the specimen was coated on one side. A 16 percent reduction of heat transfer was recorded on the back side of the metal when the specimen was coated on both sides. The test results indicate that there would be a reduction of heat transfer through metal walls when Delcoat® is applied to the walls.